Longi Hi-MO7 610W Bifacial Solar Panel

Longi Hi-MO7 610W Bifacial Solar Panel – High-Efficiency Utility-Grade Module

The Longi Hi-MO7 610W bifacial solar panel (model LR8-66HGD-610M) is a next-generation, high-output photovoltaic module engineered for demanding residential, commercial, and utility-scale solar installations. As part of LONGi’s advanced Hi-MO7 series, this 610W solar panel combines HPDC cell technology with a half-cell architecture to deliver excellent efficiency, strong real-world performance, and long-term reliability.

High-Efficiency 610W Solar Panel Design

With a rated front-side power output of 610 watts under Standard Test Conditions, the Longi Hi-MO7 610W panel achieves a maximum module efficiency of up to 23.1%. This high efficiency allows installers to maximise energy production per square metre, making the panel ideal for rooftops or ground-mounted systems where space optimisation is critical.

The half-cell design reduces internal electrical resistance and operating temperature, improving overall system efficiency and helping the Longi 610W bifacial solar panel maintain higher output levels under real-world operating conditions.

Bifacial Technology for Increased Energy Yield

The Hi-MO7 610W bifacial solar panel features a bifaciality rating of approximately 80% ±5%, allowing it to generate additional power from reflected light on the rear side of the module. When installed on reflective surfaces such as concrete rooftops, light-coloured ground mounts, or elevated racking systems, this bifacial Longi solar panel can significantly increase total system energy yield without adding extra panels.

This makes the Longi Hi-MO7 610W bifacial panel particularly well suited to large residential estates, commercial buildings, solar farms, and utility-scale projects focused on reducing levelised cost of energy (LCOE).

Electrical Specifications and System Compatibility

Electrically, the Longi Hi-MO7 610W solar panel is designed for modern high-voltage solar installations. It supports a maximum system voltage of 1500 V DC and a maximum series fuse rating of 35 A, allowing longer string configurations and improved system design flexibility.

Key electrical characteristics at STC include an open-circuit voltage (Voc) of approximately 48.38 V, a short-circuit current (Isc) of approximately 15.95 A, a voltage at maximum power (Vmp) of approximately 40.51 V, and a current at maximum power (Imp) of approximately 15.06 A. These values make the Longi Hi-MO7 610W panel compatible with a wide range of commercial and utility-grade inverters when correctly stringed.

Mechanical Strength and Build Quality

The Longi Hi-MO7 610W bifacial solar panel is built for long-term durability in harsh outdoor environments. It features a robust dual-glass construction using two layers of 2.0 mm heat-strengthened glass, combined with a high-strength anodised aluminium alloy frame.

The panel is mechanically rated to withstand front-side static loads of up to 5400 Pa and rear-side loads of up to 2400 Pa, ensuring reliable performance in high-wind regions and exposed installations. This construction also improves resistance to moisture ingress and environmental stress over the system’s lifespan.

Temperature Performance and Climate Suitability

Designed for stable operation across a wide range of environmental conditions, the Longi Hi-MO7 610W solar panel operates within a temperature range of -40°C to +85°C. It features a favourable power temperature coefficient (Pmax) of -0.28% per °C, helping to limit output losses during high ambient temperatures commonly experienced in South Africa.

This thermal performance makes the Longi Hi-MO7 610W bifacial module well suited to both inland and coastal installations where heat resilience is essential.

Dimensions, Weight, and Installation Considerations

The panel measures approximately 2382 × 1134 × 30 mm and has a weight of 33.5 kg. Its size and weight classify it as a utility-format module, best suited to installations with adequate structural support and professional handling during transport and mounting.

Warranty and Long-Term Performance Assurance

Long-term reliability is a core strength of the Longi Hi-MO7 610W bifacial solar panel. The module is rated for less than 1% power degradation in the first year, followed by an annual degradation rate of just 0.4% from year 2 through year 30.

This performance is supported by a 12-year warranty on materials and workmanship and a 30-year linear power output warranty, providing confidence in sustained energy production and long-term return on investment.

Certifications and Compliance

The Longi Hi-MO7 610W solar panel complies with international standards including IEC 61215, IEC 61730, and UL 61730, ensuring suitability for grid-connected systems that require proven certification, bankability, and global compliance.